I-BET-762

BET inhibitor,highly potent CAS# 1260907-17-2

I-BET-762

Catalog No. BCC4474----Order now to get a substantial discount!

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Chemical structure

I-BET-762

3D structure

Chemical Properties of I-BET-762

Cas No. 1260907-17-2 SDF Download SDF
PubChem ID 46943432 Appearance Powder
Formula C22H22ClN5O2 M.Wt 423.9
Type of Compound N/A Storage Desiccate at -20°C
Synonyms I-BET 762; Molibresib
Solubility DMSO : 33.33 mg/mL (78.63 mM; Need ultrasonic)
H2O : < 0.1 mg/mL (insoluble)
Chemical Name 2-[(4S)-6-(4-chlorophenyl)-8-methoxy-1-methyl-4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepin-4-yl]-N-ethylacetamide
SMILES CCNC(=O)CC1C2=NN=C(N2C3=C(C=C(C=C3)OC)C(=N1)C4=CC=C(C=C4)Cl)C
Standard InChIKey AAAQFGUYHFJNHI-SFHVURJKSA-N
Standard InChI InChI=1S/C22H22ClN5O2/c1-4-24-20(29)12-18-22-27-26-13(2)28(22)19-10-9-16(30-3)11-17(19)21(25-18)14-5-7-15(23)8-6-14/h5-11,18H,4,12H2,1-3H3,(H,24,29)/t18-/m0/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of I-BET-762

DescriptionI-BET-762 is a highly potent inhibitor of bromo and extra C-terminal domain (BET) family with IC50 values of 32.5–42.5 nM.
TargetsBET    
IC5032.5–42.5 nM     

Protocol

Cell Assay [2]
VCaP, LNCaP, 22RV1, DU145 and PC3 prostate cancer cell lines are seeded in 96-well plates at 2000-10,000 cells/well (optimum density for growth) in a total volume of 100μL media containing 10% FBS. Serially diluted compounds in 100μL media are added to the cells 12hr later. Following 96 hr. incubation, cell viability is assessed by Cell-Titer GLO. The values are normalized and IC50 is calculated using GraphPad Prism software. For long-term colony formation assay, 10,000-50,000 cells/well are seeded in six-well plates and treated with either 100 nM or 500 nM of JQ1 or DMSO. After 12 days cells are fixed with methanol, stained with crystal violet and photographed. For colorimetric assays, the stained wells are treated with 500μL 10% acetic acid and the absorbance is measured at 560nm using a spectrophotometer[2].

Animal Administration [3]
Mice[3] The antimyeloma efficacy of orally administered GSK 525762A is tested in a systemic xenograft myeloma model. For this purpose, sublethally irradiated (200 cGy) NOD/SCID mice age 9 to 11 weeks are given 107 OPM-2 myeloma cells via tail vein injection. On day 15 following inoculation, animals are started on oral treatment with GSK 525762A at escalating doses or vehicle (1% methylcellulose and 0.2% sodium lauryl sulfate), which is continued up to day 83. Specifically, 1 group of mice are treated with vehicle and 4 groups with different dosing schedules of GSK 525762A: 3 mg/kg per day; 10 mg/kg per day; 30 mg/kg on alternate days; and 30 to 20 mg/kg per day (ie, 30 mg/kg per day for 14 days, followed by 2 weeks [days 15 to 31] off treatment [drug is withheld due to a decline in body weight until animals has regained weight], follow by 20 mg/kg per day until termination of the experiment [days 43 to 82]). Blood samples (~70 μL) are removed at 0.5 hours after oral administration of GSK 525762A on day 15 (treatment initiation); days 27, 45, and 82 (3, 10, and 20 to 30 mg/kg once per day groups only); and day 83 (30 mg/kg once every other day group only). The blood is centrifuged to obtain 20 μL plasma and stored at -20°C prior to analysis for GSK 525762A by using a specific liquid chromatography/mass spectrometry/mass spectrometry assay.

References:
[1]. Nicodeme E, et al. Suppression of inflammation by a synthetic histone mimic. Nature. 2010 Dec 23;468(7327):1119-23. [2]. Asangani IA, et al. Therapeutic targeting of BET bromodomain proteins in castration-resistant prostate cancer. Nature. 2014 Jun 12;510(7504):278-82. [3]. Chaidos A, et al. Potent antimyeloma activity of the novel bromodomain inhibitors I-BET151 and I-BET762. Blood. 2014 Jan 30;123(5):697-705.

I-BET-762 Dilution Calculator

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I-BET-762 Molarity Calculator

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Preparing Stock Solutions of I-BET-762

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.359 mL 11.7952 mL 23.5905 mL 47.1809 mL 58.9762 mL
5 mM 0.4718 mL 2.359 mL 4.7181 mL 9.4362 mL 11.7952 mL
10 mM 0.2359 mL 1.1795 mL 2.359 mL 4.7181 mL 5.8976 mL
50 mM 0.0472 mL 0.2359 mL 0.4718 mL 0.9436 mL 1.1795 mL
100 mM 0.0236 mL 0.118 mL 0.2359 mL 0.4718 mL 0.5898 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on I-BET-762

I-BET-762 is a highly potent inhibitor of BET with IC50 values of 32.5–42.5 nM [1].

I-BET-762 is found to have high affinity with BET (Kd of 50.5–61.3 nM). It binds to the acetyl-lysine (AcK)-binding pocket of BET and competes with AcK. The structure of I-BET-762 allows it to bind with BET in ratio of 2:1 results in the high affinity of it. I-BET-762 also has high selectivity, it has no interaction with other bromodomain-containing proteins. I-BET-762 is reported to downregulate the expression of the genes which are induced by LPS, thus causing the decreased expression of LPS-inducible cytokines and chemokines. In vivo assay shows that I-BET-762 has the anti-inflammatory potential. Treatment of I-BET-762 can cure the mice which have started to develop symptoms of inflammatory disease [1].

References:
[1] Nicodeme E, Jeffrey KL, Schaefer U, Beinke S, Dewell S, Chung CW, Chandwani R, Marazzi I, Wilson P, Coste H, White J, Kirilovsky J, Rice CM, Lora JM, Prinjha RK, Lee K, Tarakhovsky A. Suppression of inflammation by a synthetic histone mimic. Nature. 2010 Dec 23;468 (7327):1119-23.

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References on I-BET-762

Bromodomain inhibitors, JQ1 and I-BET 762, as potential therapies for pancreatic cancer.[Pubmed:28254412]

Cancer Lett. 2017 May 28;394:76-87.

Bromodomain inhibitors (JQ1 and I-BET 762) are a new generation of selective, small molecule inhibitors that target BET (bromodomain and extra terminal) proteins. By impairing their ability to bind to acetylated lysines on histones, bromodomain inhibitors interfere with transcriptional initiation and elongation. BET proteins regulate several genes responsible for cell cycle, apoptosis and inflammation. In this study, JQ1 and I-BET 762 decreased c-Myc and p-Erk 1/2 protein levels and inhibited proliferation in pancreatic cancer cells. The tumor microenvironment is known to play an important role in pancreatic cancer, and these drugs suppressed the production of nitric oxide and a variety of inflammatory cytokines, including IL-6, CCL2, and GM-CSF, in both immune and pancreatic cancer cells in vitro. Notably, the bromodomain inhibitors also reduced protein levels of p-Erk 1/2 and p-STAT3 in mouse models of pancreatic cancer. All of these proteins are essential for tumor promotion, progression and metastasis. In conclusion, the bromodomain inhibitors JQ1 and I-BET 762 targeted and suppressed multiple pathways in pancreatic cancer. I-BET 762 and a number of other bromodomain inhibitors are currently being tested in several clinical trials, making them potentially promising drugs for the treatment of pancreatic cancer, an often-fatal disease.

Description

Molibresib (I-BET762; GSK525762) is a BET bromodomain inhibitor with IC50 of 32.5-42.5 nM.

Keywords:

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